Clinical trials
Observational Study clinical trials
Below are recruiting observational study clinical trials, each written for real people, not researchers. We’re tracking 824 recruiting studies, each written for real people, not researchers, below.
Recruiting studies
- NCT07780500Recruiting
Using electronic health records to study people with high blood pressure
This study is not testing a new medicine. Instead, it is using electronic health records to better understand people with high blood pressure, with a focus on those recently diagnosed. If you join, you may help researchers learn more about how to improve care for others with high blood pressure.
Oakland, CaliforniaAges 18 years+ - NCT07776067Recruiting
CT scans to predict outcomes in gastric cancer
This study looks at CT scans and clinical information from people with stomach cancer to see if they can help predict how the disease will progress. It may help doctors better understand each patient's situation.
Wuhan, HubeiAges 18 years+ - NCT05098821Recruiting
Study factors that affect eczema control on dupilumab
This trial studies why eczema (“atopic dermatitis”) varies in severity even when people receive the medicine dupilumab. It may help doctors better predict who responds well and how to monitor treatment.
BerlinAges 18–75 - NCT07774455Recruiting
Pacritinib in real-world settings for myelofibrosis
This study looks at how well pacritinib works in everyday medical practice for people with myelofibrosis, a type of bone marrow disorder. It helps us understand the benefits and risks of this treatment for patients like you.
New Haven, ConnecticutAges 18 years+ - NCT07775495Recruiting
Urine light patterns for microplastic exposure
This research study uses photographs of urine samples to explore how microplastics and nanoplastics in the environment might show up in your body. It is observational, meaning you will not receive treatment, but your participation could help scientists better understand everyday plastic exposure.
Birmingham, AlabamaAges 18 years+ - NCT06450327Recruiting
Resistant Hypertension: A Complex Condition Study
This study looks at why some people with hard-to-control high blood pressure (resistant hypertension) may also have other health problems. It aims to better understand the condition and how to help patients like you.
Votuporanga, São PauloAges 18–85 - NCT07761676Recruiting
Health checkup trends study for regular participants
This study follows healthy adults who get regular checkups at a specific hospital. It looks at health trends over time to understand wellness in this group, which could help improve preventive care.
Beijing, Beijing MunicipalityAges 18 years+ - NCT07762339Recruiting
Comparing two pain blocks for children having testicle surgery
This study compares two pain-relief techniques (erector spinae plane block vs. caudal block) in children aged 1 to 7 years undergoing orchiopexy (surgery for an undescended testicle). The goal is to see which method provides better pain control after surgery. Your child must be generally healthy and meet specific criteria to participate.
Istanbul, şişliAges 1–7 - NCT05097820Recruiting
Study of silicone gel testicular implants after placement
This is an observational study that follows people who receive silicone gel-filled testicular implants. It aims to collect real-world information about safety and healing to help improve future care.
Ghent, East-FlandersAges birth–110 years - NCT06590142Recruiting
Studying bowel tissue for future Hirschsprung's treatments
This trial collects leftover intestine tissue from children having bowel surgery to help develop future treatments using a child's own cells. It aims to find better ways to repair the bowel without needing donor tissue.
Liverpool, MerseysideAges birth–15 years - NCT07743944Recruiting
Breast cancer second-line treatment patterns in China
This study looks at how doctors in China treat hormone receptor-positive, HER2-negative breast cancer that has spread, when patients are starting their second line of therapy. The goal is to learn more about real-world treatment patterns and results, which may help you and your doctor make more informed treatment decisions.
Nanjing, JiangsuAges 18 years+ - NCT07745491Recruiting
AI tool to predict pneumonia after heart surgery
This study uses artificial intelligence to help predict if patients might develop pneumonia after heart or blood vessel surgery. It aims to find warning signs early so doctors can act sooner.
TomskAges 18 years+ - NCT07746167Recruiting
Pupil response study in healthy adults
This study looks at how your pupils react to light in healthy people. It may help doctors understand normal eye responses, which could improve future eye tests.
Washington D.C., District of ColumbiaAges 18–60 - NCT06628336Recruiting
Study of HARMONY Evolution hip replacement implants
This study looks at how well HARMONY Evolution implants and tools work for people getting a total hip replacement. It will help doctors understand if the implants are safe and effective over time.
BesançonAges 18–99 - NCT04728542Recruiting
Observational study comparing two osteoporosis treatment approaches
This is an observational study, meaning researchers watch what happens in real life rather than assigning a treatment by chance. It compares outcomes between people using ORIGIN® and VANGUARD® PS, to better understand how these approaches perform.
MainzAges 18 years+ - NCT07731399Recruiting
Diabetes Study for Medicaid Members in South Carolina
This study collects blood samples and health information from people with type 2 diabetes and healthy controls to learn more about diabetes. It may help improve future care for diabetes.
Orangeburg, South CarolinaAges 40–70 - NCT07724496Recruiting
H. pylori and stomach growth features study
This study looks at whether having H. pylori infection (a common stomach bacteria) and certain features of stomach growth can predict how early stomach cancer or pre-cancerous changes will behave and what your long-term outlook might be. You may be eligible if you are being treated with a camera-based removal procedure called endoscopic submucosal dissection (ESD).
Beijing, Beijing MunicipalityAges 18–80 - NCT07723157Recruiting
Cesarean scar healing after first C-section
This study watches how a cesarean scar heals after a first-time C-section done after 26 weeks of pregnancy. It's an observational study—no treatments are tested—just careful tracking to learn more about recovery.
GdanskAges 18 years+ - NCT07716969Recruiting
Reducing time without treatment for psychosis
This trial tests a program to help people get treatment faster for psychosis. It is for patients who have started OPUS treatment within the last 9 months and may have a schizophrenia-related condition.
Copenhagen, DenmarkAges 18–35 - NCT06637657Recruiting
Optimizing long-term heart disease prevention
This trial tests different ways to manage and reduce the risk of future heart problems in people who have already had a heart attack or a procedure to open blocked heart arteries. The goal is to find the best long-term treatment plan to keep you healthy.
AmsterdamAges 18 years+ - NCT07707622Enrolling by invitation
Sepsis treatment study for ICU patients
This trial studies treatments for sepsis, a serious infection complication, in ICU patients. It aims to find better ways to care for critically ill patients with sepsis.
BeijingAges 18 years+ - NCT05826665Recruiting
Study of heart rhythm mapping during AF ablation
This is an observational study that looks at how a special heart mapping system may affect the procedure and outcomes for people having ablation for persistent atrial fibrillation (AF). It may help doctors better understand what works best and how procedures turn out.
Jonesboro, ArkansasAges 18–80 - NCT07699016Recruiting
Hemostatic agent use in heart and blood vessel surgery
This trial surveys surgeons about how they use hemostatic agents (medications that stop bleeding during surgery). It aims to understand current practices and improve patient safety.
Milan, MIAges 18 years+ - NCT07695376Recruiting
Caramel study on women's health with digital devices
This study follows women aged 40–60 to see how smartphones and wearable devices can help monitor health over time. It aims to improve care by using technology that fits easily into daily life.
BogotáAges 40–60
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Common questions
- Are there clinical trials for observational study?
- Yes. Clin2 currently lists 824 recruiting observational study studies from the U.S. registry, each rewritten for real people, not researchers, so you can see what it’s testing and who it’s for.
- How do I know if I qualify for a observational study trial?
- Each study lists its eligibility criteria — rules about age, diagnosis, and prior treatments. On every Clin2 trial page we explain these in words written for real people and offer a short, optional pre-screen for a fit read. The study team makes the final decision.
- Does it cost anything to join a observational study trial?
- Using Clin2 is always free. Many trials cover the cost of the study treatment and related visits; some reimburse travel. The study team explains exactly what’s covered before you decide.
Related conditions
Clin2 helps you find and understand clinical trials and does not provide medical advice. Study data comes from ClinicalTrials.gov. Talk with your doctor about whether a specific trial is right for you.